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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2019 | Jun. 30, 2018 | Jun. 29, 2019 | Jun. 30, 2018
Numerator [Abstract] |  |  |  |
Net earnings attributable to Vishay stockholders | $ 44,477 | $ 103,097 | $ 119,936 | $ 165,463
Denominator [Abstract] |  |  |  |
Weighted average shares (in shares) | 144,441 | 144,215 | 144,409 | 144,188
Outstanding phantom stock units (in shares) | 180 | 167 | 180 | 167
Adjusted weighted average shares - basic (in shares) | 144,621 | 144,382 | 144,589 | 144,355
Effect of dilutive securities [Abstract] |  |  |  |
Convertible and exchangeable debt instruments (in shares) | 24 | 12,810 | 131 | 13,710
Restricted stock units (in shares) | 378 | 465 | 438 | 515
Dilutive potential common shares (in shares) | 402 | 13,275 | 569 | 14,225
Denominator for diluted earnings per share [Abstract] |  |  |  |
Adjusted weighted average shares - diluted (in shares) | 145,023 | 157,657 | 145,158 | 158,580
Basic earnings per share attributable to Vishay stockholders (in dollars per share) | $ 0.31 | $ 0.71 | $ 0.83 | $ 1.15
Diluted earnings per share attributable to Vishay stockholders (in dollars per share) | $ 0.31 | $ 0.65 | $ 0.83 | $ 1.04
Convertible Senior Notes, Due 2025 [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 19,055 | 3,769 | 19,053 | 1,885
Minimum market price of common stock for inclusion of shares issuable upon conversion of senior debentures for calculation of diluted earnings per share (in dollars per share) | $ 31.47 |  | $ 31.47 |
Convertible Senior Debentures, Due 2041 [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract] |  |  |  |
Minimum market price of common stock for inclusion of shares issuable upon conversion of senior debentures for calculation of diluted earnings per share (in dollars per share) | $ 17.31 |  | $ 17.31 |
Weighted Average Other [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 315 | 307 | 315 | 307
Convertible Senior Debentures, Due 2040 [Member] |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract] |  |  |  |
Minimum market price of common stock for inclusion of shares issuable upon conversion of senior debentures for calculation of diluted earnings per share (in dollars per share) | $ 12.63 |  | $ 12.63 |

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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=117327953&loc=d3e4984-109258 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1252-109256 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117326831&loc=SL5780133-109256 + Details
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